diff --git a/tessellations/4-4/4-4-2/4-4-2-1f-1.tes b/tessellations/4-4/4-4-2/4-4-2-1f-1.tes
new file mode 100644
index 00000000..0b043627
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1f-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1F, solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0)(1)(2 5)[3 4]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-2/4-4-2-1f-2.tes b/tessellations/4-4/4-4-2/4-4-2-1f-2.tes
new file mode 100644
index 00000000..db08ef0b
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1f-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1F, solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0)(1 4)(2 3)(5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-2/4-4-2-1f-3.tes b/tessellations/4-4/4-4-2/4-4-2-1f-3.tes
new file mode 100644
index 00000000..4ea36c2b
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1f-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1F, solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0 1)(2 3)(4 5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-2/4-4-2-1s-1.tes b/tessellations/4-4/4-4-2/4-4-2-1s-1.tes
new file mode 100644
index 00000000..a5e8f7cb
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1s-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1S, solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0)(1)(2 5)(3)(4)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-2/4-4-2-1s-2.tes b/tessellations/4-4/4-4-2/4-4-2-1s-2.tes
new file mode 100644
index 00000000..84c7b396
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1s-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1S, solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0 3)[1 2][4 5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-2/4-4-2-1s-3.tes b/tessellations/4-4/4-4-2/4-4-2-1s-3.tes
new file mode 100644
index 00000000..c0fccd46
--- /dev/null
+++ b/tessellations/4-4/4-4-2/4-4-2-1s-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, domino 1S, solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,1,2)
+# the Conway notation
+conway("(0 2)(1)(3 5)(4)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1f-1.tes b/tessellations/4-4/4-4-3/4-4-3-1f-1.tes
new file mode 100644
index 00000000..24c7e15b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1f-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1F (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)(1)(2 7)(3 6)[4 5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1f-2.tes b/tessellations/4-4/4-4-3/4-4-3-1f-2.tes
new file mode 100644
index 00000000..4b68b52a
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1f-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1F (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)(1 5)(2)(3 4)(6 7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1f-3.tes b/tessellations/4-4/4-4-3/4-4-3-1f-3.tes
new file mode 100644
index 00000000..1bcc77df
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1f-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1F (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)(1 5)(2 4)(3)(6 7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1f-4.tes b/tessellations/4-4/4-4-3/4-4-3-1f-4.tes
new file mode 100644
index 00000000..ee46ba0e
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1f-4.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1F (I), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)(1 5)[2][3][4](6 7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1f-5.tes b/tessellations/4-4/4-4-3/4-4-3-1f-5.tes
new file mode 100644
index 00000000..7ffc2e95
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1f-5.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1F (I), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)[1 6](2 4)(3)[5 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1s-1.tes b/tessellations/4-4/4-4-3/4-4-3-1s-1.tes
new file mode 100644
index 00000000..e3b55f0b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1s-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1S (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0)(1)(2 7)(3 6)(4)(5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1s-2.tes b/tessellations/4-4/4-4-3/4-4-3-1s-2.tes
new file mode 100644
index 00000000..08096c08
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1s-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1S (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0 2)(1)(3 7)(4 6)(5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-1s-3.tes b/tessellations/4-4/4-4-3/4-4-3-1s-3.tes
new file mode 100644
index 00000000..334a122b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-1s-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 1S (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,2,2)
+# the Conway notation
+conway("(0 3)[1 2](4 7)[5 6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-01.tes b/tessellations/4-4/4-4-3/4-4-3-2-01.tes
new file mode 100644
index 00000000..f0fc6233
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-01.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2)(3 6)(4)(5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-02.tes b/tessellations/4-4/4-4-3/4-4-3-2-02.tes
new file mode 100644
index 00000000..d711da13
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-02.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2)(3 6)(4 5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-03.tes b/tessellations/4-4/4-4-3/4-4-3-2-03.tes
new file mode 100644
index 00000000..c7af432c
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-03.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2)(3 6)[4][5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-04.tes b/tessellations/4-4/4-4-3/4-4-3-2-04.tes
new file mode 100644
index 00000000..e2dc8c4a
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-04.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2)(3 6)[4 5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-05.tes b/tessellations/4-4/4-4-3/4-4-3-2-05.tes
new file mode 100644
index 00000000..33c26f4c
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-05.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2 3)(4 5)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-06.tes b/tessellations/4-4/4-4-3/4-4-3-2-06.tes
new file mode 100644
index 00000000..4fda52a5
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-06.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)(2 6)(3)(4 5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-07.tes b/tessellations/4-4/4-4-3/4-4-3-2-07.tes
new file mode 100644
index 00000000..97576b9a
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-07.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)[2][3](4 5)[6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-08.tes b/tessellations/4-4/4-4-3/4-4-3-2-08.tes
new file mode 100644
index 00000000..d4a90afe
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-08.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)[2][3][4][5][6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-09.tes b/tessellations/4-4/4-4-3/4-4-3-2-09.tes
new file mode 100644
index 00000000..3dec713b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-09.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)[2 4][3 5](6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-10.tes b/tessellations/4-4/4-4-3/4-4-3-2-10.tes
new file mode 100644
index 00000000..2ba45f63
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-10.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0)(1 7)[2 5](3)[4 6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-11.tes b/tessellations/4-4/4-4-3/4-4-3-2-11.tes
new file mode 100644
index 00000000..e37129df
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-11.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 7)(5)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-12.tes b/tessellations/4-4/4-4-3/4-4-3-2-12.tes
new file mode 100644
index 00000000..f4d1e448
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-12.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 7)[5 6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-13.tes b/tessellations/4-4/4-4-3/4-4-3-2-13.tes
new file mode 100644
index 00000000..00fdf963
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-13.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("(0 3)(1 5)(2 6)(4 7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-14.tes b/tessellations/4-4/4-4-3/4-4-3-2-14.tes
new file mode 100644
index 00000000..a595ee8b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-14.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("[0 2][1 7](3 6)(4)(5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-15.tes b/tessellations/4-4/4-4-3/4-4-3-2-15.tes
new file mode 100644
index 00000000..880e4279
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-15.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("[0 2][1 7](3 6)(4 5)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-16.tes b/tessellations/4-4/4-4-3/4-4-3-2-16.tes
new file mode 100644
index 00000000..47dc5fba
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-16.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("[0 2][1 7](3 6)[4][5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-3/4-4-3-2-17.tes b/tessellations/4-4/4-4-3/4-4-3-2-17.tes
new file mode 100644
index 00000000..e3f1f79b
--- /dev/null
+++ b/tessellations/4-4/4-4-3/4-4-3-2-17.tes
@@ -0,0 +1,9 @@
+## {4,4}, tromino 2 (L), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,1,1,3)
+# the Conway notation
+conway("[0 2][1 7](3 6)[4 5]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-1.tes b/tessellations/4-4/4-4-4/4-4-4-1f-1.tes
new file mode 100644
index 00000000..36c85efa
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1)(2 9)(3 8)(4 7)[5 6]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-2.tes b/tessellations/4-4/4-4-4/4-4-4-1f-2.tes
new file mode 100644
index 00000000..51945837
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1 6)(2)(3 5)(4)(7 9)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-3.tes b/tessellations/4-4/4-4-4/4-4-4-1f-3.tes
new file mode 100644
index 00000000..c42d4421
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1 6)(2 3)(4 5)(7 9)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-4.tes b/tessellations/4-4/4-4-4/4-4-4-1f-4.tes
new file mode 100644
index 00000000..6f7ee63c
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-4.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1 6)(2 5)(3 4)(7 9)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-5.tes b/tessellations/4-4/4-4-4/4-4-4-1f-5.tes
new file mode 100644
index 00000000..0beaad7d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-5.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1 6)[2][3][4][5](7 9)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-6.tes b/tessellations/4-4/4-4-4/4-4-4-1f-6.tes
new file mode 100644
index 00000000..2f522ec7
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-6.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1 6)[2 4][3 5](7 9)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-7.tes b/tessellations/4-4/4-4-4/4-4-4-1f-7.tes
new file mode 100644
index 00000000..a224a81f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-7.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0 7)(1 6)(2 3)(4 5)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1f-8.tes b/tessellations/4-4/4-4-4/4-4-4-1f-8.tes
new file mode 100644
index 00000000..ad1df570
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1f-8.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1F (I), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0 7)[1 3][2 6](4 5)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1s-1.tes b/tessellations/4-4/4-4-4/4-4-4-1s-1.tes
new file mode 100644
index 00000000..b0b0fe43
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1s-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1S (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0)(1)(2 9)(3 8)(4 7)(5)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1s-2.tes b/tessellations/4-4/4-4-4/4-4-4-1s-2.tes
new file mode 100644
index 00000000..67f254ef
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1s-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1S (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0 2)(1)(3 9)(4 8)(5 7)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1s-3.tes b/tessellations/4-4/4-4-4/4-4-4-1s-3.tes
new file mode 100644
index 00000000..ae01e80d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1s-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1S (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0 3)[1 2](4 9)(5 8)[6 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-1s-4.tes b/tessellations/4-4/4-4-4/4-4-4-1s-4.tes
new file mode 100644
index 00000000..952d6c4d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-1s-4.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 1S (I), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,2,2)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 9)(6)(7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-01.tes b/tessellations/4-4/4-4-4/4-4-4-2-01.tes
new file mode 100644
index 00000000..06a6701f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-01.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0)(1 9)(2 3)(4 8)(5 6)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-02.tes b/tessellations/4-4/4-4-4/4-4-4-2-02.tes
new file mode 100644
index 00000000..3d69b6c1
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-02.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0)(1 9)(2 7)(3)(4 6)(5)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-03.tes b/tessellations/4-4/4-4-4/4-4-4-2-03.tes
new file mode 100644
index 00000000..42407c0c
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-03.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 1)(2 9)(3 8)(4 5)(6 7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-04.tes b/tessellations/4-4/4-4-4/4-4-4-2-04.tes
new file mode 100644
index 00000000..77238c9f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-04.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 1)(2 9)(3 8)[4][5][6][7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-05.tes b/tessellations/4-4/4-4-4/4-4-4-2-05.tes
new file mode 100644
index 00000000..0c5b4d3d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-05.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 9)(5 8)(6)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-06.tes b/tessellations/4-4/4-4-4/4-4-4-2-06.tes
new file mode 100644
index 00000000..126cda90
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-06.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 9)(5 8)[6 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-07.tes b/tessellations/4-4/4-4-4/4-4-4-2-07.tes
new file mode 100644
index 00000000..32ebc8e2
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-07.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)(1 6)(2 7)(4 9)(5 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-08.tes b/tessellations/4-4/4-4-4/4-4-4-2-08.tes
new file mode 100644
index 00000000..4acb66da
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-08.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)[1 2](4 9)(5 8)(6)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-09.tes b/tessellations/4-4/4-4-4/4-4-4-2-09.tes
new file mode 100644
index 00000000..ef6dc6c7
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-09.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)[1 2](4 9)(5 8)[6 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-10.tes b/tessellations/4-4/4-4-4/4-4-4-2-10.tes
new file mode 100644
index 00000000..3b8a1a10
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-10.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 3)[1 7][2 6](4 9)(5 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-11.tes b/tessellations/4-4/4-4-4/4-4-4-2-11.tes
new file mode 100644
index 00000000..df648b6f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-11.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1)(2 3)(4 6)(5)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-12.tes b/tessellations/4-4/4-4-4/4-4-4-2-12.tes
new file mode 100644
index 00000000..3fbb919b
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-12.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 4)(2)(3)(5 6)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-13.tes b/tessellations/4-4/4-4-4/4-4-4-2-13.tes
new file mode 100644
index 00000000..78fb6c7f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-13.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 4)(2 3)(5 6)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-14.tes b/tessellations/4-4/4-4-4/4-4-4-2-14.tes
new file mode 100644
index 00000000..501f62fb
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-14.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 4)[2][3](5 6)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-15.tes b/tessellations/4-4/4-4-4/4-4-4-2-15.tes
new file mode 100644
index 00000000..9f3eab87
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-15.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 4)[2 3](5 6)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-16.tes b/tessellations/4-4/4-4-4/4-4-4-2-16.tes
new file mode 100644
index 00000000..588943c8
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-16.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 5)(2 3)(4)(6)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-17.tes b/tessellations/4-4/4-4-4/4-4-4-2-17.tes
new file mode 100644
index 00000000..009243a6
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-17.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 6)(2 3)(4 5)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-18.tes b/tessellations/4-4/4-4-4/4-4-4-2-18.tes
new file mode 100644
index 00000000..87a8e054
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-18.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 18
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)(1 6)[2 4][3 5](8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-19.tes b/tessellations/4-4/4-4-4/4-4-4-2-19.tes
new file mode 100644
index 00000000..bd4966a9
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-19.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 19
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)[1](2 3)[4][5][6](8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-20.tes b/tessellations/4-4/4-4-4/4-4-4-2-20.tes
new file mode 100644
index 00000000..2bfddebb
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-20.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 20
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)[1][2][3][4][5][6](8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-21.tes b/tessellations/4-4/4-4-4/4-4-4-2-21.tes
new file mode 100644
index 00000000..13ab7f6d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-21.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 21
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)[1 3][2 6](4 5)(8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-22.tes b/tessellations/4-4/4-4-4/4-4-4-2-22.tes
new file mode 100644
index 00000000..345f78a6
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-22.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 22
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("(0 7)[1 5](2 3)[4 6](8 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-23.tes b/tessellations/4-4/4-4-4/4-4-4-2-23.tes
new file mode 100644
index 00000000..a374f7e7
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-23.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 23
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 4](1 6)[2 8][3 9][5 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-24.tes b/tessellations/4-4/4-4-4/4-4-4-2-24.tes
new file mode 100644
index 00000000..980086e7
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-24.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 24
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 4][1 7][2 8][3 9](5 6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-25.tes b/tessellations/4-4/4-4-4/4-4-4-2-25.tes
new file mode 100644
index 00000000..bb66504c
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-25.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 25
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 7](1 4)(2)(3)[5 8][6 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-26.tes b/tessellations/4-4/4-4-4/4-4-4-2-26.tes
new file mode 100644
index 00000000..2c75be7e
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-26.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 26
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 7](1 4)(2 3)[5 8][6 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-27.tes b/tessellations/4-4/4-4-4/4-4-4-2-27.tes
new file mode 100644
index 00000000..8be9b831
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-27.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 27
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 7](1 4)[2][3][5 8][6 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-28.tes b/tessellations/4-4/4-4-4/4-4-4-2-28.tes
new file mode 100644
index 00000000..6af22338
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-28.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 28
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 7](1 4)[2 3][5 8][6 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-29.tes b/tessellations/4-4/4-4-4/4-4-4-2-29.tes
new file mode 100644
index 00000000..a8a9b404
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-29.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 29
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 8](1 6)(2 3)(4 5)[7 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-2-30.tes b/tessellations/4-4/4-4-4/4-4-4-2-30.tes
new file mode 100644
index 00000000..874dd3a3
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-2-30.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 2 (L), solution 30
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,1,2,3)
+# the Conway notation
+conway("[0 8](1 6)[2 4][3 5][7 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-01.tes b/tessellations/4-4/4-4-4/4-4-4-3f-01.tes
new file mode 100644
index 00000000..e54cca46
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-01.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)[4 6][5 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-02.tes b/tessellations/4-4/4-4-4/4-4-4-3f-02.tes
new file mode 100644
index 00000000..8b849e8a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-02.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 7)(3 5)(4)(6)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-03.tes b/tessellations/4-4/4-4-4/4-4-4-3f-03.tes
new file mode 100644
index 00000000..1ffebc52
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-03.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 9)(5 8)[6 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-04.tes b/tessellations/4-4/4-4-4/4-4-4-3f-04.tes
new file mode 100644
index 00000000..fbbdd24a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-04.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 9)(7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-05.tes b/tessellations/4-4/4-4-4/4-4-4-3f-05.tes
new file mode 100644
index 00000000..983d7998
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-05.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 9)[7][8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-06.tes b/tessellations/4-4/4-4-4/4-4-4-3f-06.tes
new file mode 100644
index 00000000..1fcdad5a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-06.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 9)[7 8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-07.tes b/tessellations/4-4/4-4-4/4-4-4-3f-07.tes
new file mode 100644
index 00000000..b27e25f4
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-07.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2 3)(6 9)[7][8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-08.tes b/tessellations/4-4/4-4-4/4-4-4-3f-08.tes
new file mode 100644
index 00000000..96ed5b5c
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-08.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2 3)(6 9)[7 8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-09.tes b/tessellations/4-4/4-4-4/4-4-4-3f-09.tes
new file mode 100644
index 00000000..e40a4b76
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-09.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)[2][3](6 9)[7 8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-10.tes b/tessellations/4-4/4-4-4/4-4-4-3f-10.tes
new file mode 100644
index 00000000..99888ef5
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-10.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 8)[1 4][2 5][3 7](6)(9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-11.tes b/tessellations/4-4/4-4-4/4-4-4-3f-11.tes
new file mode 100644
index 00000000..caf1f3d4
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-11.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("[0 4][1 5](2 7)[3 9][6 8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3f-12.tes b/tessellations/4-4/4-4-4/4-4-4-3f-12.tes
new file mode 100644
index 00000000..37819c1a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3f-12.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3F (S), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("[0 4][1 5][2 6][3 9](7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-1.tes b/tessellations/4-4/4-4-4/4-4-4-3s-1.tes
new file mode 100644
index 00000000..b7137fa5
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-1.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4 6)(5)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-2.tes b/tessellations/4-4/4-4-4/4-4-4-3s-2.tes
new file mode 100644
index 00000000..47b96a25
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-2.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 3)(4 6)(5)(7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-3.tes b/tessellations/4-4/4-4-4/4-4-4-3s-3.tes
new file mode 100644
index 00000000..01ab8599
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-3.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)[2][3](4 6)(5)[7][8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-4.tes b/tessellations/4-4/4-4-4/4-4-4-3s-4.tes
new file mode 100644
index 00000000..54088fe8
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-4.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 5)(1 4)[2 3](6 9)[7 8]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-5.tes b/tessellations/4-4/4-4-4/4-4-4-3s-5.tes
new file mode 100644
index 00000000..69d35619
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-5.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 9)(5 8)(6)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-6.tes b/tessellations/4-4/4-4-4/4-4-4-3s-6.tes
new file mode 100644
index 00000000..1ebd7711
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-6.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("(0 3)[1 2](4 9)(5 8)[6 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-3s-7.tes b/tessellations/4-4/4-4-4/4-4-4-3s-7.tes
new file mode 100644
index 00000000..e0d037e2
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-3s-7.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 3S (S), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,2,1,3)
+# the Conway notation
+conway("[0 2][1 9](3 8)[4 6][5 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-01.tes b/tessellations/4-4/4-4-4/4-4-4-4-01.tes
new file mode 100644
index 00000000..4848910b
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-01.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4)(5 7)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-02.tes b/tessellations/4-4/4-4-4/4-4-4-4-02.tes
new file mode 100644
index 00000000..78ec967f
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-02.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)[4 6][5 7]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-03.tes b/tessellations/4-4/4-4-4/4-4-4-4-03.tes
new file mode 100644
index 00000000..cb788bcb
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-03.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 3)(4 8)(5 7)(6)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-04.tes b/tessellations/4-4/4-4-4/4-4-4-4-04.tes
new file mode 100644
index 00000000..7e86d0ad
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-04.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 4)(3)(5)(6 8)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-05.tes b/tessellations/4-4/4-4-4/4-4-4-4-05.tes
new file mode 100644
index 00000000..abcec31a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-05.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 4)(3)(5 7)(6)(8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-06.tes b/tessellations/4-4/4-4-4/4-4-4-4-06.tes
new file mode 100644
index 00000000..90a71dbf
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-06.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 9)(6 8)(7)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-07.tes b/tessellations/4-4/4-4-4/4-4-4-4-07.tes
new file mode 100644
index 00000000..c4f5d973
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-07.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0 4)(1 7)(2 6)(3 8)(5 9)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-08.tes b/tessellations/4-4/4-4-4/4-4-4-4-08.tes
new file mode 100644
index 00000000..76ea0428
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-08.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0 5)(1 2)(3 4)(6 9)(7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-09.tes b/tessellations/4-4/4-4-4/4-4-4-4-09.tes
new file mode 100644
index 00000000..2b4aee9a
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-09.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("(0 5)[1][2][3][4](6 9)(7 8)")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-4-10.tes b/tessellations/4-4/4-4-4/4-4-4-4-10.tes
new file mode 100644
index 00000000..7c1fec8d
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-4-10.tes
@@ -0,0 +1,9 @@
+## {4,4}, tetromino 4 (T), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,1,1,3)
+# the Conway notation
+conway("[0 6][1 7](2 3)[4 8][5 9]")
+sublines(1)
diff --git a/tessellations/4-4/4-4-4/4-4-4-5f-1.tes b/tessellations/4-4/4-4-4/4-4-4-5f-1.tes
new file mode 100644
index 00000000..10d66fca
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-5f-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, tetromino 5F (O), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,2,1,2,1,2,1,2)
+# the Conway notation
+conway("(0)(1 6)(2 5)(3 4)(7)")
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-4/4-4-4-5s-1.tes b/tessellations/4-4/4-4-4/4-4-4-5s-1.tes
new file mode 100644
index 00000000..6bc897e6
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-5s-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, tetromino 5S (O), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,2,1,2,1,2,1,2)
+# the Conway notation
+conway("(0)(1 2)(3 7)(4)(5 6)")
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-4/4-4-4-5v-1.tes b/tessellations/4-4/4-4-4/4-4-4-5v-1.tes
new file mode 100644
index 00000000..f1209082
--- /dev/null
+++ b/tessellations/4-4/4-4-4/4-4-4-5v-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, tetromino 5V (O), solution 1; identical to {4,4}, included for completeness
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,2,1,2,1,2,1,2)
+# the Conway notation
+conway("(0 1)(2 7)(3 6)(4 5)")
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-01.tes b/tessellations/4-4/4-4-5/4-4-5-01f-01.tes
new file mode 100644
index 00000000..9b80b86a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1)(2 11)(3 10)(4 9)(5 8)[6 7]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-02.tes b/tessellations/4-4/4-4-5/4-4-5-01f-02.tes
new file mode 100644
index 00000000..9d63a5c5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1 7)(2)(3 6)(4 5)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-03.tes b/tessellations/4-4/4-4-5/4-4-5-01f-03.tes
new file mode 100644
index 00000000..45adca51
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1 7)(2 3)(4 6)(5)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-04.tes b/tessellations/4-4/4-4-5/4-4-5-01f-04.tes
new file mode 100644
index 00000000..f60e13a6
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1 7)(2 4)(3)(5 6)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-05.tes b/tessellations/4-4/4-4-5/4-4-5-01f-05.tes
new file mode 100644
index 00000000..a3dedaa1
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1 7)(2 6)(3 5)(4)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-06.tes b/tessellations/4-4/4-4-5/4-4-5-01f-06.tes
new file mode 100644
index 00000000..79e59414
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1 7)[2][3][4][5][6](8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-07.tes b/tessellations/4-4/4-4-5/4-4-5-01f-07.tes
new file mode 100644
index 00000000..1e0c4b78
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 8)(1 7)(2 3)(4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-08.tes b/tessellations/4-4/4-4-5/4-4-5-01f-08.tes
new file mode 100644
index 00000000..3c50dd52
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 8)[1 3][2 7](4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-09.tes b/tessellations/4-4/4-4-5/4-4-5-01f-09.tes
new file mode 100644
index 00000000..f7ffc934
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 10)(1 7)(2 4)(3)(5 6)(8 9)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01f-10.tes b/tessellations/4-4/4-4-5/4-4-5-01f-10.tes
new file mode 100644
index 00000000..8f9746e4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01f-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1F (I), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 10)(1 7)[2][3][4][5][6](8 9)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01s-1.tes b/tessellations/4-4/4-4-5/4-4-5-01s-1.tes
new file mode 100644
index 00000000..55d54c66
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01s-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1S (I), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0)(1)(2 11)(3 10)(4 9)(5 8)(6)(7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01s-2.tes b/tessellations/4-4/4-4-5/4-4-5-01s-2.tes
new file mode 100644
index 00000000..5a16f24d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01s-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1S (I), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 2)(1)(3 11)(4 10)(5 9)(6 8)(7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01s-3.tes b/tessellations/4-4/4-4-5/4-4-5-01s-3.tes
new file mode 100644
index 00000000..fd4cdc58
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01s-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1S (I), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-01s-4.tes b/tessellations/4-4/4-4-5/4-4-5-01s-4.tes
new file mode 100644
index 00000000..4c80046d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-01s-4.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 1S (I), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,2,1,1,2,2,2,2)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 11)(6 10)(7)(8 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-02-1.tes b/tessellations/4-4/4-4-5/4-4-5-02-1.tes
new file mode 100644
index 00000000..ce5c9130
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-02-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 2 (U), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,2,1,1,3,3)
+# the Conway notation
+conway("(0)(1 11)(2 10)(3)(4 9)(5 6)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-02-2.tes b/tessellations/4-4/4-4-5/4-4-5-02-2.tes
new file mode 100644
index 00000000..f2290d82
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-02-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 2 (U), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,2,1,1,3,3)
+# the Conway notation
+conway("(0)(1 11)(2 10)(3)(4 9)[5 7][6 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-02-3.tes b/tessellations/4-4/4-4-5/4-4-5-02-3.tes
new file mode 100644
index 00000000..141c7eb0
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-02-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 2 (U), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,1,2,1,1,3,3)
+# the Conway notation
+conway("(0)(1 11)(2 10)(3 8)(4 6)(5)(7)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-01.tes b/tessellations/4-4/4-4-5/4-4-5-03-01.tes
new file mode 100644
index 00000000..5c2ff127
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 3)(4 10)(5 9)(6 7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-02.tes b/tessellations/4-4/4-4-5/4-4-5-03-02.tes
new file mode 100644
index 00000000..207eba6e
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 8)(3)(4 7)(5 6)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-03.tes b/tessellations/4-4/4-4-5/4-4-5-03-03.tes
new file mode 100644
index 00000000..9b3979f9
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 1)(2 11)(3 10)(4 7)(5 6)(8 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-04.tes b/tessellations/4-4/4-4-5/4-4-5-03-04.tes
new file mode 100644
index 00000000..0cf02a6d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-05.tes b/tessellations/4-4/4-4-5/4-4-5-03-05.tes
new file mode 100644
index 00000000..6a82ebf7
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-06.tes b/tessellations/4-4/4-4-5/4-4-5-03-06.tes
new file mode 100644
index 00000000..0951596f
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)(1 7)(2 8)(4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-07.tes b/tessellations/4-4/4-4-5/4-4-5-03-07.tes
new file mode 100644
index 00000000..84c4d94c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-08.tes b/tessellations/4-4/4-4-5/4-4-5-03-08.tes
new file mode 100644
index 00000000..361e8c4e
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-09.tes b/tessellations/4-4/4-4-5/4-4-5-03-09.tes
new file mode 100644
index 00000000..701d8aa6
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 3)[1 8][2 7](4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-10.tes b/tessellations/4-4/4-4-5/4-4-5-03-10.tes
new file mode 100644
index 00000000..4813c83c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1)(2 3)(4 7)(5 6)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-11.tes b/tessellations/4-4/4-4-5/4-4-5-03-11.tes
new file mode 100644
index 00000000..7e6baccc
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-11.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 4)(2)(3)(5 7)(6)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-12.tes b/tessellations/4-4/4-4-5/4-4-5-03-12.tes
new file mode 100644
index 00000000..25aa8836
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-12.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 4)(2 3)(5 7)(6)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-13.tes b/tessellations/4-4/4-4-5/4-4-5-03-13.tes
new file mode 100644
index 00000000..4b0b446b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-13.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 4)[2][3](5 7)(6)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-14.tes b/tessellations/4-4/4-4-5/4-4-5-03-14.tes
new file mode 100644
index 00000000..470a6cf5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-14.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 4)[2 3](5 7)(6)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-15.tes b/tessellations/4-4/4-4-5/4-4-5-03-15.tes
new file mode 100644
index 00000000..9b909c35
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-15.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 5)(2 3)(4)(6 7)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-16.tes b/tessellations/4-4/4-4-5/4-4-5-03-16.tes
new file mode 100644
index 00000000..2bf2e2ff
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-16.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 6)(2 3)(4 5)(7)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-17.tes b/tessellations/4-4/4-4-5/4-4-5-03-17.tes
new file mode 100644
index 00000000..d52de1a4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-17.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 6)[2 4][3 5](7)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-18.tes b/tessellations/4-4/4-4-5/4-4-5-03-18.tes
new file mode 100644
index 00000000..46511db7
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-18.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 18
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)(1 7)(2 3)(4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-19.tes b/tessellations/4-4/4-4-5/4-4-5-03-19.tes
new file mode 100644
index 00000000..dfe8ce13
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-19.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 19
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)[1](2 3)[4][5][6][7](9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-20.tes b/tessellations/4-4/4-4-5/4-4-5-03-20.tes
new file mode 100644
index 00000000..5cc26458
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-20.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 20
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)[1][2][3][4][5][6][7](9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-21.tes b/tessellations/4-4/4-4-5/4-4-5-03-21.tes
new file mode 100644
index 00000000..d1e41ead
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-21.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 21
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("(0 8)[1 3][2 7](4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-22.tes b/tessellations/4-4/4-4-5/4-4-5-03-22.tes
new file mode 100644
index 00000000..05b332da
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-22.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 22
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("[0 4][1 8][2 10][3 11](5 7)(6)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-23.tes b/tessellations/4-4/4-4-5/4-4-5-03-23.tes
new file mode 100644
index 00000000..defaa293
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-23.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 23
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("[0 8](1 4)(2)(3)[5 9][6 10][7 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-24.tes b/tessellations/4-4/4-4-5/4-4-5-03-24.tes
new file mode 100644
index 00000000..423aa672
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-24.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 24
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("[0 8](1 4)(2 3)[5 9][6 10][7 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-25.tes b/tessellations/4-4/4-4-5/4-4-5-03-25.tes
new file mode 100644
index 00000000..c2ca0e0a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-25.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 25
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("[0 8](1 4)[2][3][5 9][6 10][7 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-03-26.tes b/tessellations/4-4/4-4-5/4-4-5-03-26.tes
new file mode 100644
index 00000000..db70c0c9
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-03-26.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 3 (L), solution 26
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,2,2,1,1,2,2,3)
+# the Conway notation
+conway("[0 8](1 4)[2 3][5 9][6 10][7 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04f-1.tes b/tessellations/4-4/4-4-5/4-4-5-04f-1.tes
new file mode 100644
index 00000000..299528e7
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04f-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4F (S), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0)(1 11)[2 7](3)[4 8][5 9][6 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04f-2.tes b/tessellations/4-4/4-4-5/4-4-5-04f-2.tes
new file mode 100644
index 00000000..4270b36f
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04f-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4F (S), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04f-3.tes b/tessellations/4-4/4-4-5/4-4-5-04f-3.tes
new file mode 100644
index 00000000..df7da9b5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04f-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4F (S), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0 7)(1 2)(3 6)(4 5)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04s-1.tes b/tessellations/4-4/4-4-5/4-4-5-04s-1.tes
new file mode 100644
index 00000000..02e6e9da
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04s-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4S (S), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 3)(4 10)(5 7)(6)(8 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04s-2.tes b/tessellations/4-4/4-4-5/4-4-5-04s-2.tes
new file mode 100644
index 00000000..03cc4f7a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04s-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4S (S), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0 1)(2 11)(3 10)(4 9)(5 8)(6 7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04s-3.tes b/tessellations/4-4/4-4-5/4-4-5-04s-3.tes
new file mode 100644
index 00000000..a62f3387
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04s-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4S (S), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-04s-4.tes b/tessellations/4-4/4-4-5/4-4-5-04s-4.tes
new file mode 100644
index 00000000..92c3cf99
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-04s-4.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 4S (S), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,2,3,1,1,2,1,2,3)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-01.tes b/tessellations/4-4/4-4-5/4-4-5-05-01.tes
new file mode 100644
index 00000000..948b77c2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 3)(4 10)(5 9)(6 8)(7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-02.tes b/tessellations/4-4/4-4-5/4-4-5-05-02.tes
new file mode 100644
index 00000000..b00b2416
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 9)(3 5)(4)(6 8)(7)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-03.tes b/tessellations/4-4/4-4-5/4-4-5-05-03.tes
new file mode 100644
index 00000000..005ce0f0
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 1)(2 11)(3 10)(4 9)(5 8)(6 7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-04.tes b/tessellations/4-4/4-4-5/4-4-5-05-04.tes
new file mode 100644
index 00000000..ee8a1d69
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 11)(7 9)(8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-05.tes b/tessellations/4-4/4-4-5/4-4-5-05-05.tes
new file mode 100644
index 00000000..0f0da3ef
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-06.tes b/tessellations/4-4/4-4-5/4-4-5-05-06.tes
new file mode 100644
index 00000000..98cccf41
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)(2 3)(6 11)(7 9)(8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-07.tes b/tessellations/4-4/4-4-5/4-4-5-05-07.tes
new file mode 100644
index 00000000..dcb61c4a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)(2 3)(6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-08.tes b/tessellations/4-4/4-4-5/4-4-5-05-08.tes
new file mode 100644
index 00000000..7234c1b5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)[2][3](6 11)(7 9)(8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-09.tes b/tessellations/4-4/4-4-5/4-4-5-05-09.tes
new file mode 100644
index 00000000..3a153d13
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)[2][3](6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-10.tes b/tessellations/4-4/4-4-5/4-4-5-05-10.tes
new file mode 100644
index 00000000..d65a0c87
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)[2 3](6 11)(7 9)(8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-11.tes b/tessellations/4-4/4-4-5/4-4-5-05-11.tes
new file mode 100644
index 00000000..cce26be0
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-11.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 5)(1 4)[2 3](6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-12.tes b/tessellations/4-4/4-4-5/4-4-5-05-12.tes
new file mode 100644
index 00000000..ce78b13d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-12.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 9)(1 2)(3 8)(4 7)(5 6)(10 11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-13.tes b/tessellations/4-4/4-4-5/4-4-5-05-13.tes
new file mode 100644
index 00000000..5ab91e38
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-13.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 9)(1 8)(2 7)(3)(4 6)(5)(10 11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-14.tes b/tessellations/4-4/4-4-5/4-4-5-05-14.tes
new file mode 100644
index 00000000..cf7a6a7d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-14.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("(0 9)(1 8)(2 7)(3 5)(4)(6)(10 11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-15.tes b/tessellations/4-4/4-4-5/4-4-5-05-15.tes
new file mode 100644
index 00000000..6760c1db
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-15.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("[0 4][1 5][2 10][3 11](6)(7 9)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-16.tes b/tessellations/4-4/4-4-5/4-4-5-05-16.tes
new file mode 100644
index 00000000..13da0f1c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-16.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("[0 4][1 5][2 10][3 11](6 8)(7)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-17.tes b/tessellations/4-4/4-4-5/4-4-5-05-17.tes
new file mode 100644
index 00000000..d12bfbeb
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-17.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("[0 10](1 8)(2 7)(3)(4 6)(5)[9 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-05-18.tes b/tessellations/4-4/4-4-5/4-4-5-05-18.tes
new file mode 100644
index 00000000..19f535a7
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-05-18.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 5 (R), solution 18
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,1,3,1,1,2,3)
+# the Conway notation
+conway("[0 10](1 8)(2 7)(3 5)(4)(6)[9 11]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-01.tes b/tessellations/4-4/4-4-5/4-4-5-06-01.tes
new file mode 100644
index 00000000..910e6623
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 9)(5 8)(6)(7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-02.tes b/tessellations/4-4/4-4-5/4-4-5-06-02.tes
new file mode 100644
index 00000000..44555f82
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 9)(5 8)(6 7)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-03.tes b/tessellations/4-4/4-4-5/4-4-5-06-03.tes
new file mode 100644
index 00000000..24fd5ba5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 9)(5 8)[6][7]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-04.tes b/tessellations/4-4/4-4-5/4-4-5-06-04.tes
new file mode 100644
index 00000000..f68b5762
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 9)(5 8)[6 7]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-05.tes b/tessellations/4-4/4-4-5/4-4-5-06-05.tes
new file mode 100644
index 00000000..08a68c5e
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0)(1 11)[2 7](3)[4 8][5 9][6 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-06.tes b/tessellations/4-4/4-4-5/4-4-5-06-06.tes
new file mode 100644
index 00000000..f6ccf342
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-07.tes b/tessellations/4-4/4-4-5/4-4-5-06-07.tes
new file mode 100644
index 00000000..6b1754e4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-08.tes b/tessellations/4-4/4-4-5/4-4-5-06-08.tes
new file mode 100644
index 00000000..9d48951e
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 3)(1 7)(2 8)(4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-09.tes b/tessellations/4-4/4-4-5/4-4-5-06-09.tes
new file mode 100644
index 00000000..20fcc609
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2)(3)(6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-10.tes b/tessellations/4-4/4-4-5/4-4-5-06-10.tes
new file mode 100644
index 00000000..f2d6b53b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 5)(1 4)(2 3)(6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-11.tes b/tessellations/4-4/4-4-5/4-4-5-06-11.tes
new file mode 100644
index 00000000..4ee5d9d8
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-11.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 5)(1 4)[2][3](6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-12.tes b/tessellations/4-4/4-4-5/4-4-5-06-12.tes
new file mode 100644
index 00000000..7f531d89
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-12.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 5)(1 4)[2 3](6 11)[7 9][8 10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-13.tes b/tessellations/4-4/4-4-5/4-4-5-06-13.tes
new file mode 100644
index 00000000..081e1737
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-13.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 8)(1 6)(2)(3 5)(4)(7)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-14.tes b/tessellations/4-4/4-4-5/4-4-5-06-14.tes
new file mode 100644
index 00000000..13fefdb6
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-14.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 8)(1 7)(2 3)(4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-06-15.tes b/tessellations/4-4/4-4-5/4-4-5-06-15.tes
new file mode 100644
index 00000000..c789b08c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-06-15.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 6 (W), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,1,2,1,1,3,1,3)
+# the Conway notation
+conway("(0 8)[1 3][2 7](4 6)(5)(9 11)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-01.tes b/tessellations/4-4/4-4-5/4-4-5-07-01.tes
new file mode 100644
index 00000000..b0f11cb3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 7)(5 6)(8 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-02.tes b/tessellations/4-4/4-4-5/4-4-5-07-02.tes
new file mode 100644
index 00000000..7403f5e3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)[4 7][5 8][6 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-03.tes b/tessellations/4-4/4-4-5/4-4-5-07-03.tes
new file mode 100644
index 00000000..4403054a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 3)(4 7)(5 6)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-04.tes b/tessellations/4-4/4-4-5/4-4-5-07-04.tes
new file mode 100644
index 00000000..30cf64d9
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 6)(3 5)(4)(7)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-05.tes b/tessellations/4-4/4-4-5/4-4-5-07-05.tes
new file mode 100644
index 00000000..e1f725ed
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 8)(3)(4 7)(5 6)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-06.tes b/tessellations/4-4/4-4-5/4-4-5-07-06.tes
new file mode 100644
index 00000000..8535ba6f
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 9)(3 8)(4 7)(5 6)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-07.tes b/tessellations/4-4/4-4-5/4-4-5-07-07.tes
new file mode 100644
index 00000000..fb45264a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 9)(3 8)[4 6][5 7](10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-08.tes b/tessellations/4-4/4-4-5/4-4-5-07-08.tes
new file mode 100644
index 00000000..ed475cc3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 10)(3 9)(4 7)(5 6)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-09.tes b/tessellations/4-4/4-4-5/4-4-5-07-09.tes
new file mode 100644
index 00000000..4c353207
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0)(1 11)[2][3](4 7)(5 6)[8][9][10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-10.tes b/tessellations/4-4/4-4-5/4-4-5-07-10.tes
new file mode 100644
index 00000000..242a488b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-11.tes b/tessellations/4-4/4-4-5/4-4-5-07-11.tes
new file mode 100644
index 00000000..74aebca6
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-11.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-12.tes b/tessellations/4-4/4-4-5/4-4-5-07-12.tes
new file mode 100644
index 00000000..31d748e3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-12.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)(1 7)(2 8)(4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-13.tes b/tessellations/4-4/4-4-5/4-4-5-07-13.tes
new file mode 100644
index 00000000..ce449de4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-13.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-14.tes b/tessellations/4-4/4-4-5/4-4-5-07-14.tes
new file mode 100644
index 00000000..16b58e11
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-14.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)[1 2](4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-15.tes b/tessellations/4-4/4-4-5/4-4-5-07-15.tes
new file mode 100644
index 00000000..dec1e1f3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-15.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 3)[1 8][2 7](4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-16.tes b/tessellations/4-4/4-4-5/4-4-5-07-16.tes
new file mode 100644
index 00000000..a8fc7612
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-16.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 10)(1)(2 9)(3 8)(4 7)(5 6)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-17.tes b/tessellations/4-4/4-4-5/4-4-5-07-17.tes
new file mode 100644
index 00000000..99727c6c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-17.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 10)(1)(2 9)(3 8)[4 6][5 7](11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-18.tes b/tessellations/4-4/4-4-5/4-4-5-07-18.tes
new file mode 100644
index 00000000..b6fd1ed2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-18.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 18
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 10)(1 7)(2 6)(3 5)(4)(8 9)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-19.tes b/tessellations/4-4/4-4-5/4-4-5-07-19.tes
new file mode 100644
index 00000000..d4b8bf15
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-19.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 19
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("(0 10)[1 8](2 6)(3 5)(4)[7 9](11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-20.tes b/tessellations/4-4/4-4-5/4-4-5-07-20.tes
new file mode 100644
index 00000000..9a6f3a92
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-20.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 20
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("[0 2][1 11](3 10)(4 7)(5 6)(8 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-21.tes b/tessellations/4-4/4-4-5/4-4-5-07-21.tes
new file mode 100644
index 00000000..2cdf43a6
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-21.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 21
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("[0 2][1 11](3 10)[4 7][5 8][6 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-07-22.tes b/tessellations/4-4/4-4-5/4-4-5-07-22.tes
new file mode 100644
index 00000000..dfeec9d4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-07-22.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 7 (N), solution 22
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,1,3,2,1,1,2,2,1,3)
+# the Conway notation
+conway("[0 4][1 5][2 7][3 11](6)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-08-1.tes b/tessellations/4-4/4-4-5/4-4-5-08-1.tes
new file mode 100644
index 00000000..38699106
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-08-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 8 (T), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,2,1,1,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 4)(3)(5 10)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-08-2.tes b/tessellations/4-4/4-4-5/4-4-5-08-2.tes
new file mode 100644
index 00000000..37e27485
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-08-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 8 (T), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,2,1,1,2,3)
+# the Conway notation
+conway("(0)(1 11)(2 4)(3)(5 10)[6 8][7 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-08-3.tes b/tessellations/4-4/4-4-5/4-4-5-08-3.tes
new file mode 100644
index 00000000..4956069c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-08-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 8 (T), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,2,1,1,2,3)
+# the Conway notation
+conway("(0 1)(2 11)(3 10)(4 5)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-08-4.tes b/tessellations/4-4/4-4-5/4-4-5-08-4.tes
new file mode 100644
index 00000000..f1b3299a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-08-4.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 8 (T), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,1,3,2,1,1,2,3)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 11)(6 9)(7 8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-1.tes b/tessellations/4-4/4-4-5/4-4-5-09-1.tes
new file mode 100644
index 00000000..bc0e34a2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0)(1 7)(2 4)(3)(5 6)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-2.tes b/tessellations/4-4/4-4-5/4-4-5-09-2.tes
new file mode 100644
index 00000000..f7c807ea
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-2.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0 1)(2 7)(3 6)(4 5)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-3.tes b/tessellations/4-4/4-4-5/4-4-5-09-3.tes
new file mode 100644
index 00000000..d5a1f9cd
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-3.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)(7)(8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-4.tes b/tessellations/4-4/4-4-5/4-4-5-09-4.tes
new file mode 100644
index 00000000..df35caa9
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-4.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0 3)(1)(2)(4 11)(5 10)(6 9)[7 8]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-5.tes b/tessellations/4-4/4-4-5/4-4-5-09-5.tes
new file mode 100644
index 00000000..8b03aa8d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-5.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0 3)(1 7)(2 8)(4 11)(5 10)(6 9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-09-6.tes b/tessellations/4-4/4-4-5/4-4-5-09-6.tes
new file mode 100644
index 00000000..02b77c52
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-09-6.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 9 (V), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,2,1,1,2,3,2)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 7)(6)(8 11)(9 10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-01.tes b/tessellations/4-4/4-4-5/4-4-5-10-01.tes
new file mode 100644
index 00000000..b4977629
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-01.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)(4 5)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-02.tes b/tessellations/4-4/4-4-5/4-4-5-10-02.tes
new file mode 100644
index 00000000..e901f78c
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-02.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2)(3 10)[4 7][5 8][6 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-03.tes b/tessellations/4-4/4-4-5/4-4-5-10-03.tes
new file mode 100644
index 00000000..5d54df4b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-03.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 3)(4 10)(5)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-04.tes b/tessellations/4-4/4-4-5/4-4-5-10-04.tes
new file mode 100644
index 00000000..ebd7e35a
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-04.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 4)(3)(5 10)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-05.tes b/tessellations/4-4/4-4-5/4-4-5-10-05.tes
new file mode 100644
index 00000000..102b5655
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-05.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 4)(3)(5 10)[6 8][7 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-06.tes b/tessellations/4-4/4-4-5/4-4-5-10-06.tes
new file mode 100644
index 00000000..b5abbb9b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-06.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 5)(3 4)(6 9)(7 8)(10)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-07.tes b/tessellations/4-4/4-4-5/4-4-5-10-07.tes
new file mode 100644
index 00000000..b51e4c65
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-07.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 7)(3 5)(4)(6)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-08.tes b/tessellations/4-4/4-4-5/4-4-5-10-08.tes
new file mode 100644
index 00000000..ed9f2bd2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-08.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 10)(3 5)(4)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-09.tes b/tessellations/4-4/4-4-5/4-4-5-10-09.tes
new file mode 100644
index 00000000..661ba009
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-09.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)[2][3][4][5](6 9)(7 8)[10]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-10.tes b/tessellations/4-4/4-4-5/4-4-5-10-10.tes
new file mode 100644
index 00000000..0a6ed6b4
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-10.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0 5)(1)(2 4)(3)(6 11)(7)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-11.tes b/tessellations/4-4/4-4-5/4-4-5-10-11.tes
new file mode 100644
index 00000000..688c76f5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-11.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0 5)(1 9)(2 8)(3 7)(4 10)(6 11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-12.tes b/tessellations/4-4/4-4-5/4-4-5-10-12.tes
new file mode 100644
index 00000000..a3a9fd48
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-12.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0 9)(1 8)(2 5)(3 4)(6 7)(10 11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-13.tes b/tessellations/4-4/4-4-5/4-4-5-10-13.tes
new file mode 100644
index 00000000..cb430ea5
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-13.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0 10)(1)(2 5)(3 4)(6 9)(7 8)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-14.tes b/tessellations/4-4/4-4-5/4-4-5-10-14.tes
new file mode 100644
index 00000000..a9cf25cd
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-14.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("(0 10)(1 9)(2 8)(3 7)(4 5)(6)(11)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-15.tes b/tessellations/4-4/4-4-5/4-4-5-10-15.tes
new file mode 100644
index 00000000..d39f3784
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-15.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("[0 2][1 11](3 10)(4 5)(6 9)(7 8)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-10-16.tes b/tessellations/4-4/4-4-5/4-4-5-10-16.tes
new file mode 100644
index 00000000..eca21dbd
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-10-16.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 10 (Y), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,2,1,1,2,3,1,1,3)
+# the Conway notation
+conway("[0 2][1 11](3 10)[4 7][5 8][6 9]")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-11v-1.tes b/tessellations/4-4/4-4-5/4-4-5-11v-1.tes
new file mode 100644
index 00000000..dba53650
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-11v-1.tes
@@ -0,0 +1,10 @@
+## {4,4}, pentomino 11V (X), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,3,1,1,3,1,1,3,1,1,3)
+# the Conway notation
+conway("(0)(1 11)(2 4)(3)(5 7)(6)(8 10)(9)")
+sublines(1)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-01.tes b/tessellations/4-4/4-4-5/4-4-5-12-01.tes
new file mode 100644
index 00000000..7af07413
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-01.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 1
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4 7)(5)(6)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-02.tes b/tessellations/4-4/4-4-5/4-4-5-12-02.tes
new file mode 100644
index 00000000..3d9500c2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-02.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 2
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4 7)(5 6)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-03.tes b/tessellations/4-4/4-4-5/4-4-5-12-03.tes
new file mode 100644
index 00000000..51b8aee3
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-03.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 3
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4 7)[5][6]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-04.tes b/tessellations/4-4/4-4-5/4-4-5-12-04.tes
new file mode 100644
index 00000000..8bb38497
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-04.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 4
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2)(3 8)(4 7)[5 6]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-05.tes b/tessellations/4-4/4-4-5/4-4-5-12-05.tes
new file mode 100644
index 00000000..39f5faab
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-05.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 5
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 3)(4 8)(5 6)(7)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-06.tes b/tessellations/4-4/4-4-5/4-4-5-12-06.tes
new file mode 100644
index 00000000..d05fef53
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-06.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 6
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 4)(3)(5 6)(7 8)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-07.tes b/tessellations/4-4/4-4-5/4-4-5-12-07.tes
new file mode 100644
index 00000000..5b4372e9
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-07.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 7
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 4)(3)[5 7][6 8]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-08.tes b/tessellations/4-4/4-4-5/4-4-5-12-08.tes
new file mode 100644
index 00000000..5dd7a309
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-08.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 8
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 7)(3 4)(5 6)(8)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-09.tes b/tessellations/4-4/4-4-5/4-4-5-12-09.tes
new file mode 100644
index 00000000..2873f74e
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-09.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 9
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 7)[3 5][4 6](8)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-10.tes b/tessellations/4-4/4-4-5/4-4-5-12-10.tes
new file mode 100644
index 00000000..92a93129
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-10.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 10
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)(2 8)(3 7)(4)(5 6)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-11.tes b/tessellations/4-4/4-4-5/4-4-5-12-11.tes
new file mode 100644
index 00000000..41ff1295
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-11.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 11
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)[2][3][4](5 6)[7][8]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-12.tes b/tessellations/4-4/4-4-5/4-4-5-12-12.tes
new file mode 100644
index 00000000..9bd0d36b
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-12.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 12
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0)(1 9)[2][3][4][5][6][7][8]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-13.tes b/tessellations/4-4/4-4-5/4-4-5-12-13.tes
new file mode 100644
index 00000000..900d27de
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-13.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 13
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 1)(2 9)(3 4)(5 8)(6 7)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-14.tes b/tessellations/4-4/4-4-5/4-4-5-12-14.tes
new file mode 100644
index 00000000..866f957f
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-14.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 14
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 1)(2 9)(3 6)(4 5)(7 8)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-15.tes b/tessellations/4-4/4-4-5/4-4-5-12-15.tes
new file mode 100644
index 00000000..88ec3afc
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-15.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 15
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 4)(1)(2 3)(5 9)(6)(7 8)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-16.tes b/tessellations/4-4/4-4-5/4-4-5-12-16.tes
new file mode 100644
index 00000000..caad3931
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-16.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 16
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 4)(1 6)(2 8)(3 7)(5 9)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-17.tes b/tessellations/4-4/4-4-5/4-4-5-12-17.tes
new file mode 100644
index 00000000..cef3ec06
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-17.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 17
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 8)(1)(2 7)(3 4)(5 6)(9)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-18.tes b/tessellations/4-4/4-4-5/4-4-5-12-18.tes
new file mode 100644
index 00000000..77356798
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-18.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 18
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 8)(1)(2 7)[3 5][4 6](9)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-19.tes b/tessellations/4-4/4-4-5/4-4-5-12-19.tes
new file mode 100644
index 00000000..21d34c9d
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-19.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 19
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("(0 8)(1 6)(2 4)(3)(5)(7)(9)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-20.tes b/tessellations/4-4/4-4-5/4-4-5-12-20.tes
new file mode 100644
index 00000000..32beb646
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-20.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 20
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("[0 2][1 9](3 8)(4 7)(5)(6)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-21.tes b/tessellations/4-4/4-4-5/4-4-5-12-21.tes
new file mode 100644
index 00000000..43b4a818
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-21.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 21
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("[0 2][1 9](3 8)(4 7)(5 6)")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-22.tes b/tessellations/4-4/4-4-5/4-4-5-12-22.tes
new file mode 100644
index 00000000..398ad685
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-22.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 22
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("[0 2][1 9](3 8)(4 7)[5][6]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/4-4/4-4-5/4-4-5-12-23.tes b/tessellations/4-4/4-4-5/4-4-5-12-23.tes
new file mode 100644
index 00000000..391b0aa2
--- /dev/null
+++ b/tessellations/4-4/4-4-5/4-4-5-12-23.tes
@@ -0,0 +1,11 @@
+## {4,4}, pentomino 12 (P), solution 23
+e2.
+angleunit(pi/2)
+# the line below lets us specify internal angles
+angleofs(pi)
+unittile(1,1,2,2,1,2,1,2,1,3)
+# the Conway notation
+conway("[0 2][1 9](3 8)(4 7)[5 6]")
+sublines(1)
+sublines(2)
+
diff --git a/tessellations/7-3-2-1s-1.tes b/tessellations/7-3-2-1s-1.tes
new file mode 100644
index 00000000..c4089e2c
--- /dev/null
+++ b/tessellations/7-3-2-1s-1.tes
@@ -0,0 +1,10 @@
+## {7,3}, dihept 1S, solution 1
+h2.
+angleunit(2*pi/3)
+# the line below lets us specify internal angles
+angleofs(pi)
+distunit(edge(7,3))
+unittile(1,1,1,1,1,2,1,1,1,1,1,2)
+# the Conway notation
+conway("(0)(1 11)(2 8)(3 4)(5 7)(6)(9 10)")
+sublines(1)
\ No newline at end of file